Computer Simulations become more and more necessary to a well understanding of complex phenomena. Due to climate changes, upsurge of natural disasters and other ecological problems, several works try to give decision support of sticky situations. They aim at preventing these problems or defining protocols to solve them~\cite{CHU:08}.

One use of computer simulations is to reproduce sticky life context and to train stakeholders (\emph{e.g.} rescue troops, policemen or politicians) to solve critical situation. Such a simulation is participatory and users are players. Works such as the COmpanion MODeling (Comod) approach~\cite{ETI:2010} lead to the creation of participatory games and the development of participatory simulators. For example, E-ComMod game tackles the actual issue of the sustainable resource management and exploitation~\cite{Guyot:2004}. But, major elements of participatory games such as the Air Traffic Management game (train decision making in an air flow stress)~\cite{Minh:2008} and the Smach simulator (analyzing daily activities of family individuals)~\cite{Sempe:2010} are constructed separately, from scratch, without any possibility of reuse.

Games rules of participatory simulators are widely identified whereas accompaniment are not thorough, \emph{i.e.} tools supporting exchanges between stakeholders are neglected. Contrarily, the collaborative system domain neglects game rules of simulator, but provides tools and media supporting interactions between stakeholders. Groupwares such as  PAMS~\cite{PAMS:2009}, GPGCloud~\cite{GPGCloud:2009} or simExplorer\footnote{http://www.simexplorer.org/} combine generic collaborative tools and simulation tools in didactic and user-friendly suites. For example, the PAMS groupware associates video-conferencing, white-board, file sharing with simulator control panels. Because of its genericity, PAMS can be used in a wide span of research areas as  biology, ecology, economy and so on.



The aim of our work is to develop a portal taking advantage of advances in collaboration domain and participative simulation domain. We intend to extend the PAMS portal by new participatory simulation features. This new platform will thus combine generic collaborative tools (video conferencing, chat, white-board) with participatory games tools (interactive individualized interface). These add-ons may give a simple way a participatory game designer to define its scenarios and to deploy them on the portal by profiting from existing collaborative tools. The paper presents how participatory simulation are taken into account in the PAMS groupware: how dedicated user interface could be configured and displayed.

The paper is organized as follows. Section~\ref{sec:def} defines what is a participative simulation and presents needed features of a participative simulation framework. In Section~\ref{sec:metamodel} we propose a meta-model for such a framework and we details its implementation in the PAMS portal in Section~\ref{sec:integration}. Finally, in Section \ref{sec:application} we present an application case on the GAMAVI \cite{Amouroux:2010} model to validate our implementation.

